I hated the whole idea of the growing Kryptonian crystals....I think that Singer was running with a misinterpretation of how the Fortress was built in the Donner film and taking the flawed concept too far. In the Donner film, one specific crystal (distinguished by its color, which made it too easy to confuse with Kryptonite, but that's beside the point) built the Fortress out of surrounding ice....something that it was probably programmed specifically to do. There's no evidence that throwing a full-sized crystal in water is supposed to create a continent-sized land mass...and all of the other crystals in the Fortress would have themselves been created, not originals from Krypton, so you'd think they'd be inferior in that regard, not superior.
I think "the Old Mixer" wrote in the MOS thread sums up my feelings about SR and MOS, between the two, there is a great Superman movie.
I'd been thinking of throwing that line in here but hadn't gotten around to it. To phrase it my own way, somewhere between the best parts of SR and MoS is a great Superman film that we haven't seen yet.